If the user didn’t read that, that’s on them. They used a feature they didn’t understand, which is part of a version control system that they also didn’t understand, and didn’t bother reading anything. If you still think they bear no responsibility for their actions then we’ll just have to agree to disagree.

Since they don’t actually have a git project tied to their files, “all changes” means “files created”. If they did have git configured then it would mean “changes since the last commit”, and it wouldn’t delete the files.

Edit: I will concede that it’s probably not immediately apparent to someone not familiar with the system that uncommitted files will be deleted if you use the revert button. But that comes back to understanding things before you go around clicking buttons that say the action is irreversible. At a minimum, they bear responsibility for not knowing what they were doing, and still charging ahead full steam.